Gin-saw-sharpening machine



(No Model.) 2 Sheets-Sheet 1.

J. A. ROGBRSgv D. C. BURNS. GIN SAW SHARPBNING MACHINE.

vNo. 525,515. Patented'Sept. 4, 17894.

lilll! (No Model.) l 2 Sheets-Sheet 2. J. A. ROGERS & D. C.A BURNS.

-GIN SAW SHARPENING MACHINE.

Wiixyzsses 1n: nomas culs co., monurno., wnsummou. n. c.

.UNITED STATES PATENT OFFICE.

JOHN A. RoGERs AND DAVID c. BURns, or HARTsELLs, ALABAMA.

GIN-SAW-SHAYRPENING MACHINE.

SPECIFICATION forming part of Letters Patent No. 525,515, datedSeptember 4, 1894. Application tiled February 27, 1894. Serial No.501,693. (No model.)

To @ZZ whom it may concern:

Be it known that we, JOHN A. ROGERS an DAVID C. BURNS, citizens of theUnited States, residing at Hartsells, in the county of Morgan and Stateof Alabama, have invented a new and useful Cotton Gin -Saw Sharpener, of

which the following is a specification.

Our invention relates to improvements in cotton-gin saw-Sharpeners, andhas for its object to provide ,a simple and efficient sharpener, whichmay be readily and quickly ap plied to and readjusted upon the saw-arborof a cotton-gin to provide means whereby the angle of inclinationbetween the files may be adjusted to suit the bevel of the teeth of thesaws; to provide means Vfor adjusting the point of intersection of thetiles to suit different sizes of saws; to provide a simple and effectivemeans for feeding the saw and for adjusting the throw of such feedingmechanism to suit saws having different lengths of teeth; to providemeans for adjusting the pressure ofthe tiles upon the teeth of the saw;and iinally to provide means for removing the files from contact withthe teeth at the end of each iiling operation to permit of the readjustment ofthe frame for another saw after scoring the teeth of thedressed saw.

Other objects and advantages of the invention will appear in thefollowing description, and the novel features thereof will be'par-yticularly pointed out in the `appended claims.

Referring to the drawingsz--Fig-ure 1 is aV perspective view of asharpening device embodying our invention applied in an operativeposition to a saw-arbor of a cotton-gin. Fig. 2 is a vertical centralsection of the same. Fig. 3 is a rear view. Fig. 4 is a horizontalsection on the line 4 4 of Fig. 2. Fig. 5 is a detail view, partly insection, of one of the pitmen for communicating motion from thecrank-disk to the reciprocating iile-carryin g rods. Fig. 6 is a frontview. Fig. 7 is a detail sectional view of the socket for the attachmentof a file. Fig. 8 is a detail view showing the connection between thecrank disk and the pitmen.

Similar numerals of reference indicate corresponding parts in all' thefigures of the drawings. Y

1 indicates a horseshoe frame having the side legs or standards 2 adjustably connected to the lower end thereof by means of the transversebar 3. This bar is secured in keepers 4. which are connected adj ustablyto the lower endsof the side arms of the frame by means of extensions 5litted in channels 6 formed in said arms and held in the desiredrelative positions by means of the bolts 7 engaging slots 8 in the arms.The standards 2 are provided at their upper ends with eyes 9 fitted uponthe extremities of said transverse bar and secured in place at thedesired intervals by means of the set-screws 10. By means of theseset-screws the inclination of the frame with relation to the standardsmay be varied fora purpose hereinafter explained, andthe standardsterminate in yokes or seats 11, which are adapted to flt over and bearupon the portions of the saw-arbor of a cotton-gin between the saws orupon the sleeves employed to space the saws upon said arbor.

l2 represents the reciprocating tile-carrying rods which are fittedslidably at their upper ends in the guides 13 secured to theupper end ofthe frame and at intermediate points in the resilient guides 14 arrangedin a transversely disposedguide-frame 15 secured to the side arms of themain frame. These resilient guides consist of'blocks fitting slidably insaid guide-frame and pressed outward to hold the files in contact withthe teeth of the saw under treatment by means of the pressure springs16. Set-screws 17 are fitted in suitable bores in the ends of theguidefralne to adjust the tension of the springs.

The files 18 which are secured to the lower ends of the tile-carryingrods are held in place by means of the sockets 19 which are threaded toreceive the extremities of the file-carrying rods, and are provided withtriangular openings 20 which are somewhat smaller than the upper end ofthe files. The extremities of the file-carrying rods are provided withaxial bores 21 to receive the stems 22 of the iiles, and therefore whenthe tiles are fitted in the triangular openings at the lower ends of thesockets and the -latter are threaded upon the extremities of the rods,

the stems of the tiles lit in the axial bores of the file-carrying rods,the shoulders of the files bear against the terminals of the rods, andthe upper ends of the body portions of the files are forced snugly andfirmly into the IOO triangular openings of the sockets. By thisarrangement the iles are held against independent vibration, and anylooseness occurring during the operation of the mechanism may be takenup by tightening the-sockets. The guides 13 are adjustably secured tothe main frame by means of stems 23 engaging segmental slots 24 in thehead or upper end of the frame and engaged at their rear ends by theadjustable nuts 25. By adjusting these guides at dierent points in theslots the angle of inclination between the file-carrying rods may bevaried to cause the tiles vto intersect at dierent angles and at dierentdistances from the arbor of the gin-saw, and as the resilient guidesabove described are arranged loosely in the slots of the guideframe,such variations of inclination in the file-carrying rods do not causebinding of the latter.

2b' represents a crank-disk carrying eccentric spindles 27, which areconnected, respectively, by means of the pitmen 28 to intermediatepoints of the file-carrying rods. The upper ends of these pitmen areprovided with suitable bearings 29, and their lower ends are swiveled tothe transversely perforated blocks 30, said blocks being provided withset-screws whereby they may be secured at the desired points of thefile-carrying rods.

The shaft 3l of the crank-disk carries between suitable cheekplates 32 aspur-gear 33 which meshes with a similar gear 34 carried by the drivingshaft 35, the latter being provided With a suitable operating handle 36.

The feeding mechanism for moving the saw forward after dressing eachtooth in order to bring the succeeding tooth in position for treatmentis constructed as followsz-37 represents a cam-shaft mounted in suitablebearings 38 in cross-bars 39 connecting the arms of the main frame neartheir lower ends, said shaft being provided at its rear end, which isextended fora considerable distance beyoud the plane of the rear side ofthe frame, with a cam 40, and 4l represents a rockinglever carried by arock-shaft 42 suitably j ournaled upon the lower ends of the arms of theframe and provided at its lower extremity with the toothed lingers 43for engaging the teeth of the saw. These lingers are pivotally connectedto the lower end of the rockinglever, are arranged in a slot orbifurcation in said lever, and are provided with a series ofperforations 44 for the reception of the pivotpin 45, whereby theinterval between the teeth 46 at the extremities of the lingers may bevaried to suit the intervals between the teeth of the saw which is beingsharpened. It will be seen that by an oscillatory movement of the leverthe saw may be advanced at each movement a distance corresponding withthe length of throw of such lever, and that in case one of the teeth ofthe saw is broken the saw will be advanced by reason of the use of twofingers. The rocking-lever is provided at its upper end with arearwardly extending stud 47 which is arrangedin the path ot' thediametrically opposite enlargements 4S of the above mentioned cam. Saidcam consists of adisk 49 having a hub 50 which is secured to thecam-shaft by means of a set screw 5l, and the disk is beveled upon itsfront side, whereby as the diametrically opposite enlargements engagethe stud of the rocking-lever, said stud is caused to assume a positioncorresponding with the bevel of the cam. By adjusting the cam toward andfrom the plane of the main frame the extent of throw of .therocking-lever may be varied to suit saws having their teeth arranged atdiierent intervals. The reason for this operation of the rocking-leveris that as the enlargement of the cam approaches the stud the latter ispushed from the axis of the cam, (this being possible from the fact thatthe pressure is not in alignment i A with the body of the 1ever,) andsaid pressure from the axis of the cam causes the stud of the lever toslide on the beveled or under cut edge of the cam. It will be understoodthat a very slight movement of the lever is necessary to accomplish therequisite feeding of the saw, and the metal surfaces of the cam andstud, (which may be polished if preferred,) do not cause suicientfriction to prevent the sliding movement just described. Owing to theuse of the stud which projects outward perpendicular to the line of thebody of the lever, the actual lever is represented by an imaginary lineconnecting the fulcrum of the body portion of the lever With the pointof contact of the cam with the stud, and hence it will be understoodthat by adjusting the cam upon its spindle a greater or less throw ofthe lever may be attained, owing to the fact that such adjustment variesthe length of the said actual lever, or the distance between the fulcrumof the lever and the point of contact of the cam with the stud.

The front end of the cam-shaft constitutes one member of atrip-mechanism for removing the files from contact with the saw duringthe time of the feeding movement of the latter and for the purpose ofallowing the frame to be readjusted for a different saw. The cam-shaftis provided at opposite points with enlargements 52, which are adaptedto engage the inwardly extending arms of the bell-crank 'trip-levers 53,the lower ends of the vertical arms of such levers being in contact withthe outer ends of the resilient guiding-blocksfor the file-carryingIrods, whereby when an enlargement 52 encounters the inwardlyextending-arms of the trip-levers the lower arms thereof are swunginward, thereby swinging the lower end of the file-carrying rods in asimilar direction and removing the files from Contact with the saw, seeFigs. 4 and 6. The cam-shaft is provided at a point between thetransverse bars in which it is mounted with a gear 54, which meshes withthe master-gear carried by the driving-shaft.

This being the construction of our improved mechanism, the operationthereof is as follows:-The rotation of the driving shaft by means of itshandle causes a rapid rotation of the crank-disk by reason of the smallgear carried by the shaft of said crank disk, and thereby produces arapid recprocation of the tilecarryin g rods, but the cam-shaft, on theother hand, rotates slowly and is in position to trip the les from thesaw and feed the saw forward when the filing of the tooth has beencompleted. In this way the operation of the mechanism is continuous, andwhen the parts are properly adjusted to suit the size of the saw, thebevel of the teeth, and the intervals between the teeth, a saw may bedressed rapidly and efficiently, and the readjustment of the device tobring it in operative relation with the diterent saws on the arbor maybe accomplished without loss of time. The ad- J'ustment to suit theinclination of the teeth 1s accomplished by varying the inclination ofthe main frame with relation to the standards by means of the set-screwwith which said standards are provided at their upper ends.

Varlous changes in the form, proportion and the minor details ofconstruction may be resorted to Without departing from the spirit of theinvention or sacrificing any ofthe advantages thereof.

Having described our invention, whatwe claim is l. In a device of theclass described, the combination with a frame, and means for supportingthe saine upon a saw-arbor, of reciprocating tile carrying rods,laterally slidable guides for said rods, angle-levers operativelyconnected to the guides, a cam-shaft carrying enlargements to encountersaid levers at intervals to move the sliding guides laterally anddisengage the files from the teeth of a saw, and means for operating thereciprocating rods and said cam-shaft, substantially as specitied.

2. In av device of the class described, the combination with a frame,and means for supporting the same upon a saw-arbor, of tilecarryingrods, means for operating said rods, a rocking lever, means forcommunicating motion thereto from the driving mechanism, and oppositelyextending pivotal fingers carried by the rocking lever and provided withterminal teeth for engaging the teeth of a saw, said tngersh'avingspaced perforations for the reception of a pivot-pin, whereby they aresecured to the rocking-lever, substantially as specified.

3. In a device of the class described, the combination with a frame, andmeans for supporting the same upon a saw-arbor, of filecarrying rods,-and means for operating the same, a cam-shaf t connected to saidoperating means, a rocking lever having fingers for engaging the teethof a saw and provided at its upper end with a perpendicularly disposedstud, and a cam adjustably connected to said cam shaft with its axisparallel with said stud and having a beveled or undercut periphery toengage and move the stud in a direction substantially parallel with itslength, substantially as specied.

In testimony that We claim the foregoing as our own We have heretoaiixed our signatures in the presence of two witnesses.

JOHN A. ROGERS. DAVID C. BURNS. Witnesses:

JOHN A. MUZZEY, WILLIAM B. 'WooDALL

